As per CAP804:
(b) Renewal. If a class or type rating has expired, the applicant shall:
(1) take refresher training at an ATO, when necessary to reach the level of
proficiency necessary to safely operate the relevant class or type of
aeroplane; and
(2) pass a proficiency check in accordance with Appendix 9 to Part-FCL.
Revalidation is:
(i) within the 3 months preceding the expiry date of the rating, pass a
proficiency check in the relevant class in accordance with Appendix 9 to
this Part with an examiner;
So what is the difference if your SEP expires and a week later you do your renewal?
My situation is that I haven't quite reached revalidation by experience (even though I've done 12 hours in the past 12 months, they were all with a CRI therefore P/UT). I was meant to do my SEP revalidation with an examiner today however wx meant I couldn't. My SEP expires tomorrow. If I pass a proficiency check in the next week, what is the difference between that and doing it today?
What paperwork will need to be done? Is there a difference if you do it after expiration of the rating?